Salt treatment

Sorry to start a new thread as I know there are a couple going with regards to q-tanks and treating ich. I just didn't want to hijack either with my own questions.

Basically, I got all my fish at the same time after my fishless cycle. It's been about 4 weeks and all the fish look good - with the exception of my mickey mouse platies. I see no spots or anything but they are a bit pale. One platy occasionally rubs herself on a log. Mostly a couple are in hiding as the dominant ones kind of chase the others around - plus I think there is some mating rituals going on?

So, I'm a little concerned this may be the start of ich but really don't know. Can I do the salt water treatment even with my cories and bristlenose? Even if I don't see spots, would it be okay to do a salt water treatment or are there risks with it? Or should I just wait and see? I have had a sick cory before and with a bit of time he looks real good now.

I know I can try and net this one out and put in a q-tank but I don't have one yet and won't get to town for at least a few days.

Can the scrathcing and flashing be signs of stress? As I watch my platies, I have a big female sunburst and a male mickey mouse that continue to chase around 2 of the smaller platies. I'm not sure that the smaller ones just aren't malnurished as they are always hiding and when they come out, they get chased. Those 2 are really the only fish that I have seen scratching.

Now maybe they are getting chased because they are sick? I have heard some fish will do that to others but not sure if that happens with platies.

I'll sit tight for a bit and keep watching. I'll also start reading up on ich treatments just in case but like I said, I see nothing on my fish yet.